Home / 21,278.38-31,922.16-10,610.56

Finding the Fourth Proportional to 21,278.38, 31,922.16 and 10,610.56

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Solution

The fourth proportional to 21,278.38, 31,922.16 and 10,610.56 is: 15,918.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    21,278.38 : 31,922.16 = 10,610.56 : x
  2. Step 2: Convert to fraction form
    21,278.38/31,922.16 = 10,610.56/x
  3. Step 3: Cross multiply
    21,278.38x = 31,922.16 × 10,610.56
  4. Step 4: Simplify right side
    21,278.38x = 338,711,994.01
  5. Step 5: Solve for x
    x = 338,711,994.01/21,278.38
  6. Step 6: Final answer
    x = 15,918.13

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.